工業機器及び配管の断熱工事
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問題を起こすような入居者に出会ったとき、断熱材が製造過程で過熱によって黒く変色した場合、その断熱性能に影響はあるのでしょうか？どれほどの影響か？断熱材の外観検収に明確な基準はあるのか、特に色のように表面から容易に見える部分について
なぜ黒くなるのか、温度の不均衡なのか、それとも材料が合っていないのか
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